I need to add over 20 pounds of calcium to my pool. I could use some advice on the best way to get all of this calcium into my pool without causing other problems. Water is cold (60s) so I wasn't sure if I need to dissolve it in a bucket and dump it in the pool or if it would dissolve well enough in cold water to just broadcast it in the deep end and brush afterwards like is recommended on here. I assume that I shouldn't add all 20 pounds at once so I'd like some advice on how much to add at a time and how long to run the pump afterwards before adding chlorine and turning the pump off. I can add it over several days if needed. Last time I added calcium, I noticed a stain that I haven't been able to remove so I'm a bit nervous about adding so much of it to my pool.